Revert "Implement a more robust IPC system between the launcher and client (#4159)"

This reverts commit 5ffcc48d75.

packages/app-lib/src/state/process.rs

@@ -2,7 +2,6 @@ use crate::event::emit::{emit_process, emit_profile};
 use crate::event::{ProcessPayloadType, ProfilePayloadType};
 use crate::profile;
 use crate::util::io::IOError;
-use crate::util::rpc::RpcServer;
 use chrono::{DateTime, NaiveDateTime, TimeZone, Utc};
 use dashmap::DashMap;
 use quick_xml::Reader;
@@ -16,7 +15,7 @@ use std::path::{Path, PathBuf};
 use std::process::ExitStatus;
 use tempfile::TempDir;
 use tokio::io::{AsyncBufReadExt, BufReader};
-use tokio::process::{Child, Command};
+use tokio::process::{Child, ChildStdin, Command};
 use uuid::Uuid;
 
 const LAUNCHER_LOG_PATH: &str = "launcher_log.txt";
@@ -47,10 +46,9 @@ impl ProcessManager {
         logs_folder: PathBuf,
         xml_logging: bool,
         main_class_keep_alive: TempDir,
-        rpc_server: RpcServer,
         post_process_init: impl AsyncFnOnce(
             &ProcessMetadata,
-            &RpcServer,
+            &mut ChildStdin,
         ) -> crate::Result<()>,
     ) -> crate::Result<ProcessMetadata> {
         mc_command.stdout(std::process::Stdio::piped());
@@ -69,12 +67,14 @@ impl ProcessManager {
                 profile_path: profile_path.to_string(),
             },
             child: mc_proc,
-            rpc_server,
             _main_class_keep_alive: main_class_keep_alive,
         };
 
-        if let Err(e) =
-            post_process_init(&process.metadata, &process.rpc_server).await
+        if let Err(e) = post_process_init(
+            &process.metadata,
+            &mut process.child.stdin.as_mut().unwrap(),
+        )
+        .await
         {
             tracing::error!("Failed to run post-process init: {e}");
             let _ = process.child.kill().await;
@@ -165,10 +165,6 @@ impl ProcessManager {
         self.processes.get(&id).map(|x| x.metadata.clone())
     }
 
-    pub fn get_rpc(&self, id: Uuid) -> Option<RpcServer> {
-        self.processes.get(&id).map(|x| x.rpc_server.clone())
-    }
-
     pub fn get_all(&self) -> Vec<ProcessMetadata> {
         self.processes
             .iter()
@@ -219,7 +215,6 @@ struct Process {
     metadata: ProcessMetadata,
     child: Child,
     _main_class_keep_alive: TempDir,
-    rpc_server: RpcServer,
 }
 
 #[derive(Debug, Default)]